/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.druid.bvt.sql.mysql.select;

import com.alibaba.druid.sql.MysqlTest;
import com.alibaba.druid.sql.SQLUtils;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
import org.junit.Assert;

import java.util.List;

public class MySqlSelectTest_205_drds_group_concat extends MysqlTest {
    public void test_0() throws Exception {
        String sql = "SELECT student_name,\n" +
                "         GROUP_CONCAT(DISTINCT test_score\n" +
                "                      ORDER BY test_score DESC SEPARATOR ' ')\n" +
                "       FROM student\n" +
                "       GROUP BY student_name;";


        MySqlStatementParser parser = new MySqlStatementParser(sql);
        List<SQLStatement> statementList = parser.parseStatementList();
        SQLStatement stmt = statementList.get(0);

        Assert.assertEquals(1, statementList.size());

        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
        stmt.accept(visitor);

        Assert.assertEquals(1, visitor.getTables().size());
        Assert.assertEquals(2, visitor.getColumns().size());
        Assert.assertEquals(0, visitor.getConditions().size());
        Assert.assertEquals(1, visitor.getOrderByColumns().size());

        {
            String output = SQLUtils.toMySqlString(stmt);
            Assert.assertEquals("SELECT student_name, GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')\n" +
                            "FROM student\n" +
                            "GROUP BY student_name;", //
                    output);
        }
    }

}
